WO2015177464A1 - Production commerciale de l'allergène amb a1 par expression transitoire chez les plantes - Google Patents
Production commerciale de l'allergène amb a1 par expression transitoire chez les plantes Download PDFInfo
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- WO2015177464A1 WO2015177464A1 PCT/FR2015/051319 FR2015051319W WO2015177464A1 WO 2015177464 A1 WO2015177464 A1 WO 2015177464A1 FR 2015051319 W FR2015051319 W FR 2015051319W WO 2015177464 A1 WO2015177464 A1 WO 2015177464A1
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- C12N9/00—Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
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- C07K14/415—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from plants
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- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
- C12N15/09—Recombinant DNA-technology
- C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
- C12N15/79—Vectors or expression systems specially adapted for eukaryotic hosts
- C12N15/82—Vectors or expression systems specially adapted for eukaryotic hosts for plant cells, e.g. plant artificial chromosomes (PACs)
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- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
- C12N15/09—Recombinant DNA-technology
- C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
- C12N15/79—Vectors or expression systems specially adapted for eukaryotic hosts
- C12N15/82—Vectors or expression systems specially adapted for eukaryotic hosts for plant cells, e.g. plant artificial chromosomes (PACs)
- C12N15/8241—Phenotypically and genetically modified plants via recombinant DNA technology
- C12N15/8242—Phenotypically and genetically modified plants via recombinant DNA technology with non-agronomic quality (output) traits, e.g. for industrial processing; Value added, non-agronomic traits
- C12N15/8257—Phenotypically and genetically modified plants via recombinant DNA technology with non-agronomic quality (output) traits, e.g. for industrial processing; Value added, non-agronomic traits for the production of primary gene products, e.g. pharmaceutical products, interferon
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- C12N2820/00—Vectors comprising a special origin of replication system
- C12N2820/55—Vectors comprising a special origin of replication system from bacteria
Definitions
- the present invention relates to a plant cell comprising a DNA molecule comprising at least one heterologous nucleotide sequence coding for a preproprotein of a pectate lyase chosen from Amb a 1, the alpha subunit of Amb a 1, the subunit beta unit of Amb a 1, and homologs of Amb a 1, operably linked to a strong promoter.
- the invention also relates to a process for producing pectate lyase using the plant cell.
- Ragweed in particular Ambrosia artemisiifolia, is an annual plant, which belongs to the family Tubuliflores (or Asteraceae). This wild plant, native to North America, blooms from late summer until autumn. Its pollen has a very high allergenic power. Thus, ragweed is the leading cause of pollen allergy in the United States, with about 30 million people out of 40 million suffering from pollinosis. Introduced involuntarily in France in the nineteenth century, ambrosia is a highly invasive plant that has rapidly progressed from the Rhône- Switzerland region to the north of France. Thus, in 2011, ambrosia plants were found in the Ile de France. The pollen of this plant causes in susceptible persons an allergic reaction characterized by its severity.
- allergic rhinitis to ragweed is much more severe than that caused by other pollen. Symptoms such as pruritus, anosmia (loss or diminished sensitivity to smell), rhinorrhea, sneezing, and nasal obstruction are more important. In addition, in 50% of cases, this allergy evolves into asthma, often more severe than that caused by other pollen. These symptoms are all the more pronounced as the rate of pollen in the air is high.
- ragweed allergy now affects 6 to 12% of the population between late August and early September.
- the total number of consumers of ragweed antiallergic drugs increased significantly (+ 60%) between 2008 and 2011, from 161,200 to 258,700 people, and the health care costs generated by this allergy. between 5.6 and 8.6 million euros.
- Allergy to ragweed therefore represents a real public health problem today.
- the simplest way to protect yourself from the risks of allergy is to avoid pollen exposures ambrosia, but a total eviction seems impossible already despite prefectural decrees making obligatory the destruction of ambrosia. These measures have not stopped the spread of this invasive plant in many areas.
- Treatments called “symptomatic” either locally (drops, eye drops, sprays) or by the general route (tablets, capsules), help relieve symptoms during the period when pollen is present in the air. But the symptoms come back soon after stopping treatment.
- allergen immunotherapy or desensitization
- This therapeutic way makes it possible to treat the cause of the allergy contrary to the so-called “symptomatic” drugs.
- the extracts used today for the desensitization of patients allergic to ambrosia are of insufficient quality for this treatment to be effective.
- ragweed allergens have been characterized, in particular Amb a 1, which is responsible for more than 80% of cases of ragweed allergy.
- Amb a 1 is a complex plant protein with typically vegetable post-translational maturations, and only a plant expression system will be able to produce this allergen in a usable and effective form in allergen immunotherapy.
- allergen Amb a 1 although toxic in vivo, in recombinant form is possible, by transient expression in plants.
- This production which is done in a plant cell, makes it possible to obtain allergen Amb a 1 in mature and active form, with a good yield, in a very simple and reproducible way.
- Amb 1 allergen obtained is not contaminated with proteases and / or other plant-based contaminants. The inventors have thus been able to obtain a production, at commercially acceptable levels, of allergen Amb a 1.
- the subject of the invention is therefore a plant cell comprising a DNA molecule comprising at least one heterologous nucleotide sequence coding for a preproprotein of a pectate lyase chosen from Amb a 1, the alpha subunit of Amb a 1, the beta subunit of Amb a 1, and homologs of Amb a 1, operably linked to a strong promoter, preferably a 35S promoter.
- a strong promoter preferably a 35S promoter.
- said plant cell is a Nicotiana benthamiana cell.
- the plant cell according to the invention comprises a DNA molecule comprising at least one heterologous nucleotide sequence coding for a preproprotein of pectate lyase operably linked to a strong promoter, preferably a 35S promoter, said molecule of DNA not being integrated into the genome of the plant cell.
- a strong promoter preferably a 35S promoter
- pectate lyase chosen from Amb al, the alpha subunit of Amb a 1, the beta subunit of Amb a 1, and the homologues of Amb a 1 are called "pectate lyase according to the invention" in the this request.
- the subject of the invention is also a plant comprising at least one plant cell according to the invention.
- Another object of the invention is to provide a process for producing a pectate lyase according to the invention, comprising the expression of said pectate lyase in a plant cell according to the invention, or in a plant comprising such a cell.
- the pectate lyase obtainable by the method according to the invention, with a plant cell according to the invention, or with a plant according to the invention.
- the pectate lyase thus obtained can be used as a medicament. It can also be used in allergic immunotherapy alone or in combination with at least one other Asteraceae allergen. It can also be used in the diagnosis of allergies, and be integrated in an allergy diagnostic kit.
- the plant cell according to the invention comprises a DNA molecule operably linked to a strong promoter, preferably a 35S promoter.
- a strong promoter preferably a 35S promoter.
- transient expression allows the expression of said DNA molecule in transient form, ie without integration of the DNA, in particular the cDNA, into the genome of the plant cell.
- the use of the transient expression in a plant cell or a plant according to the invention makes it possible to increase the yields of production of the pectate lyase according to the invention in active form up to high levels compatible with a commercial exploitation, but incompatible with the survival of a plant that would express these stably poisonous pectates lyases.
- transient expression harvesting of the plant biomass takes place during peak expression of the recombinant protein, ie typically 4 to 6 days after transfection.
- the plant cell according to the invention comprises an expression vector comprising at least one heterologous nucleotide sequence coding for a preproprotein of a pectate lyase according to the invention operatively linked to a strong promoter, preferably a 35S promoter.
- Amb a 1 is a pectate lyase from Ambrosia artemisiifolia. Recognized by more than 80% of patients sensitized to ragweed, this allergen is responsible for more than 90% of the allergenic activity of ragweed pollen. It is a 38 kDa protein described as unglycosylated belonging to the pectate lyase family. Twelve isoforms of Amb a 1 are listed, from Amb a 1.0101 to Amb a 1.0502 (from www.allergome.org).
- Table 1 The twelve isoforms of Amb a 1, their nucleic and protein sequences
- Amb a 1 the twelve isoforms mentioned above in Table 1 above.
- the protein sequences described in Table 1 correspond to the preproproteins of the different isoforms.
- Amb a 1 undergoes proteolysis in the pollen grain and / or during the extraction or purification process resulting in two chains, alpha (26 kDa) and beta (12 kDa), non-covalently associated (King et al. , 1974, 1981). It has been shown that chemical modifications of Amb a 1, including the reduction and alkylation of disulfide bridges as well as the process of denaturation / renaturation by urea or succinylation of lysine residues, reduce its reactivity to IgE (King, 1976, Smith et al, 1988). The alpha and beta subclones of Amb a 1 have a different reactivity on IgE and T cells. In fact, Amb a 1 beta contains a large number of IgE-binding epitopes, whereas Amb has 1 alpha. Behaves like a hypoallergen and stimulates the activity of T cells.
- Amb has the protein sequence SEQ ID NO: 7 (preproprotein).
- the beta subunit has the protein sequence SEQ ID NO: 8.
- the alpha subunit has the protein sequence SEQ ID NO: 9.
- homologs of Amb a 1 proteins of the Asteraceae family which have at least 57% identity, preferably at least 60% identity, preferably at least 64% identity, with one of the isoforms of Amb has 1.
- the homolog of Amb a 1 is a plant protein of the genus Ambrosia or Artemisia, more preferably Artemisia vulgaris, Ambrosia psilostachya or Ambrosia trifida, which has at least 57% identity, preferably at least 60% identity, preferably at least 64% identity, with one of the isoforms of Amb has 1.
- the homologue of Amb a 1 is selected from Amb p 1 (from Ambrosia psilostachya, accession code 9064 on www.allergome.org) and Art v 6 (from Artemisia vulgaris, accession number A0PJ16 in Uniprot).
- percent identity between two amino acid sequences in the sense of the present invention, it is meant to designate a percentage of identical amino acid residues between the two sequences to be compared, obtained after the best alignment, this percentage being purely statistics and the differences between the two sequences being randomly distributed and their entire length.
- best alignment or “optimal alignment” is meant the alignment for which the percentage of identity determined as hereinafter is the highest.
- Sequence comparisons between two amino acid sequences are traditionally performed by comparing these sequences after optimally aligning them, said comparison being performed by segment or by "comparison window” to identify and compare the local regions of sequence similarity. .
- the optimal alignment of the sequences for comparison can be realized, besides manually, by means of the local homology algorithm of Smith and Waterman (1981, J.
- the pectate lyase according to the invention is chosen from Amb a 1.0101, Amb a 1.0201, Amb a 1.0202, Amb a 1.0301, Amb a 1.0302, Amb a 1.0303, Amb a 1.0304, Amb a 1.0305, Amb a 1.0401. , Amb a 1.0402, Amb a 1.0501, Amb a 1.0502, the alpha subunit of Amb a 1, the beta subunit of Amb a 1, and proteins of the Asteraceae family with at least 57% of identity, preferably at least 60% identity, preferably at least 64% identity, with one of the Amb a 1 isoforms.
- the pectate lyase according to the invention is chosen from Amb a 1.0101, Amb a 1.0201, Amb a 1.0202, Amb a 1.0301, Amb a 1.0302, Amb a 1.0303, Amb a 1.0304, Amb a 1.0305, Amb a 1.0401, Amb.
- the DNA molecule comprises at least one heterologous nucleotide sequence coding for a preproprotein of the pectate lyase according to the invention.
- the preproprotein of the pectate lyase according to the invention comprises a signal peptide, a propeptide and the mature pectate lyase.
- the heterologous nucleotide sequence coding for the preproprotein according to the invention therefore comprises a sequence encoding the signal peptide, a sequence encoding the propeptide and a sequence encoding the mature pectate lyase.
- the heterologous nucleotide sequence coding for the preproprotein according to the invention comprises a sequence encoding the signal peptide, a sequence encoding the propeptide of the beta subunit, a sequence encoding the beta subunit, a sequence encoding the propeptide of the subunit alpha and a sequence encoding the alpha subunit.
- the signal peptide is especially any signal peptide recognized by the plant cell, whether or not a pectate lyase. It targets in particular the pectate lyase according to the invention in the intercellular medium.
- the signal peptide is that of tobacco chitinase, or the natural signal peptide of pectate lyase.
- the propeptide is, for its part, the natural propeptide of a pectate lyase, or the propeptide of a CIA peptidase.
- the propeptide is a propeptide of CIA peptidases, especially mites or of plant origin.
- the CIA peptidase propeptide is the natural propeptide or the mutated or non-mutated propeptide of Der pl.
- the CIA peptidase propeptide is chosen from the natural peptidase propeptide CIA and the sequence SEQ ID NO: 6 (i.e., amino acids 19 to 98 of the Uniprot sequence p08176).
- the pectate lyase according to the invention is melted with its own propeptide or in fusion with the mica peptidase propeptide of mites or in fusion with a plant CIA peptidase propeptide, so to increase the production yields of the protein.
- the pectate lyase preproprotein sequence is chosen from the protein sequences listed in Table 1 above and the sequences exhibiting at least 57%, preferably at least 60%, preferably at least 64% identity. with one of these.
- the heterologous nucleotide sequence coding for the preproprotein is chosen from SEQ ID NO: 1 to 5.
- its sequence is SEQ ID NO: 1, SEQ ID NO: 2, SEQ ID NO: 3, SEQ ID NO: 4 or SEQ ID NO: 5.
- the heterologous nucleotide sequence encoding the preproprotein can be obtained from a known gene already cloned encoding a pectate lyase according to the invention, or by screening a cDNA library with anti-human antibodies. pectate lyase.
- the methods used are well known to those skilled in the art, and include in particular the identification of the gene by hybridization with probes, PCR, sequencing and molecular cloning. It is also possible to synthesize the gene to reflect the use of preferred codons in plants; in this case, it is referred to as codon optimization, often useful for strong expression of the selected proteases (Murray et al, Nucleic Acid Res 17: 477 498 (1980)).
- the heterologous nucleotide sequence encoding the preproprotein further comprises a sequence, referred to as an intracellular targeting sequence.
- This sequence makes it possible to target a storage compartment of the pectate lyase according to the invention, in order to control its maturation. This maturation is necessary to obtain pectate lyases in the most suitable form for the diagnosis of allergy and immunotherapy.
- this peptide targeting sequence targets the pectate lyase according to the invention in soluble or membrane form towards the endoplasmic reticulum or the various constituent compartments of the endomembrane secretion system of the plant cell.
- the gene of interest has been isolated and modified to contain all or part of the modifications described above and obtain the heterologous nucleotide sequence, the latter is placed in an expression vector by conventional methods.
- the selection of an appropriate expression vector will depend on the method of introducing the expression vector into host cells.
- a typical expression vector contains prokaryotic DNA elements encoding an origin of bacterial replication and an antibiotic resistance gene to be provided for growth and selection of the expression vector in the bacterial host, a cloning for insertion of an exogenous DNA sequence encoding pectate lyase; eukaryotic DNA elements such as an exogenous gene transcription initiation sequence, such as a promoter, and DNA elements that control the transcript processing, such as termination / polyadenylation sequences and an expression cassette allowing the expression of a silencing inhibitor. It also contains sequences such as t-DNAs that are necessary for the integration of a piece of DNA into the plant or into the plant cell.
- the expression vector comprises:
- DNA elements that control the processing of transcripts such as termination / polyadenylation sequences, preferably the Tnos sequence (nopaline synthase termination sequence).
- the expression vector is pAGO1.
- Promoters used to control the expression of pectate lysis are strong promoters, and may be promoters of plant genes, such as for example the ubiquitin promoter, the small subunit promoter of ribulose. 1,5-bis-Phosphate carboxylase, promoters of Agrobacterium tumefaciens, promoters of nopaline synthase and octopine synthase, or viral promoters such as 19S and 35S of cauliflower mosaic virus (CaMV).
- the strong promoter is 35S.
- the high expression and quality of the recombinant pectate lyases produced in the invention makes it possible to design their commercial production. Indeed, the pectate lyase according to the invention is typically expressed in an amount equal to at least 0.1% of the total soluble proteins of the plant, but often in a much higher amount, up to 5 to 10%.
- the plant comprising the plant cells according to the invention may be a whole plant, but may also be a plant part, such as leaves.
- the plant or plant cells according to the invention can be used as such as a medicament.
- the plant or the plant cells according to the invention can be used as such, for applications as biofuel, in animal nutrition, or in the production of paper or textile (including cotton fibers).
- the recombinant pectate lyase is purified after extraction from the plant or plant cells that express it.
- the enzyme may be expressed in fusion with tags (His6, GST, MBP, FLAG etc.) which will preferably be located in the N- or C-terminal position of the mature protein.
- tags His6, GST, MBP, FLAG etc.
- the pectate lyase according to the invention obtainable by the method according to the invention, with a plant cell according to the invention, or with a plant according to the invention, can be used as a medicament. It can also be used in allergic immunotherapy alone or in combination with at least one other Asteraceae allergen. This other allergen of Asteraceae can be selected from Amb ail, Amb a 5 and mixtures thereof.
- the subject of the invention is therefore also an allergy diagnostic kit, comprising the pectate lyase according to the invention, and means for measuring the antibodies directed against this protein.
- the subject of the invention is also an allergy diagnostic kit, comprising the pectate lyase according to the invention, means for measuring the antibodies directed against this protein, and means for measuring the antibodies directed against another Asteraceae allergen. for example allergen Amb a 11 or Amb a 5.
- the general methods of growing plants, as well as methods for introducing expression vectors into plant tissue, are available to those skilled in the art. They are varied and depend on the selected plant. Preferably, the plants will be grown according to the techniques specific to the platform Allergopur.
- This method of producing recombinant proteins is described in the application FR1255510, and comprises a first step of cultivating the plant, aeroponic or hydroponic, preferably free float culture, and under LED lighting. After this first step, in particular five weeks of hydroponic culture on free floats, agroinfiltration plants is carried out under vacuum, by agrobacteria comprising a DNA fragment coding for the pectate lyase according to the invention.
- This step of agroinfiltration can be implemented by any means to evacuate. Preferably, in the method used according to the invention, it is carried out under vacuum by the Venturi effect.
- agrobacteria that can be used according to the invention, mention may be made preferably of strains LBA4404, GV3101, EHA 101/105 or C58.
- the plants are typically drained upside down for 15 minutes, then put back into culture, typically 3 to 6 days, ideally by ensuring frequent misting of the latter for 6 minutes. first hours of culture following agroinfiltation.
- the protein is extracted and purified. Preferably, the protein is extracted and purified as described in application FR1255510.
- the plants are directly put back into culture, typically 3 to 6 days, and then the protein is extracted and purified. Extraction of the protein can be carried out by grinding the leaves, or by a process involving enzymatic infiltration.
- the pectinase is P162L marketed by Biocatalyst, formulated at 4% in a medium comprising 50mM sodium citrate pH5.2, 0.5M NaCl and 0.04% metabisulfite.
- the macérozyme is formulated at 0.5% in a medium comprising 50 mM of sodium citrate pH5.2, 0.5 M NaCl and 0.04% metabisulphite, removal of the leaves of the infiltrated plants, and incubation in an enzymatic solution of pectinase or macérozyme, for a period of between 2 h 30 and 5 h, preferably 3 h or 4 h 30, at a temperature of between 24 ° C. and 30 ° C., preferably 26 ° C., and then
- the digestate is then filtered, preferably on a web of 250 ⁇ m, and then optionally centrifuged (for example at 250 ⁇ g for 10 minutes),
- the supernatant is recovered in order to carry out a depth filtration, preferably on a Kl 00 filter (marketed by Pall).
- a depth filtration preferably on a Kl 00 filter (marketed by Pall).
- the filtrate is concentrated 20 times on a 5kDa cassette and its pH is adjusted to 7 with Na3PO4.
- the allergens Amb a 1 and Amb ai 1 can be purified by chromato graphy from the extracts as described in application FR 1255510.
- the subject of the invention is also a process for producing a pectate lyase according to the invention in a plant cell or a plant, comprising the following steps:
- step a) transfection of the plant cell or plant with the agrobacteria obtained in step a).
- the agrobacteria that can be used in step a) are chosen from strains LBA4404, GV3101, EHA 101/105 and C58.
- the expression vector used in step a) comprises:
- prokaryotic DNA elements encoding an origin of bacterial replication and an antibiotic resistance gene
- an expression cassette for the expression of a silencing inhibitor preferably p19;
- DNA elements that control the processing of transcripts such as termination / polyadenylation sequences, preferably the Tnos sequence.
- step a) is typically by methods known from the prior art, for example by thermal shocks with successive passages at 4 ° C, -80 ° C and 37 ° C.
- step b) preferably comprises the following steps:
- step bl cultivation of the plant cell or plant, aeroponic or hydroponic, and under LED lighting, preferably for five weeks in hydroponics on free floats, b2) agro-infiltration of the plant cell or plant obtained in b) under vacuum by the agrobacteria obtained in step a).
- This step of agro-infiltration is preferably carried out under vacuum by the Venturi effect.
- the pectate lyase according to the invention thus produced is extracted and purified.
- the process for producing a pectate lyase according to the invention in a plant cell or a plant further comprises a step c) of extracting the pectate lyase produced, said step c) comprising the following steps:
- pectinase or macérozyme are as described above,
- Figure 1 Schematic representation of the different cassettes for producing a mature and active pectate lyase A (B, C, F and G) or the alpha (E and I) subunit or the beta subunit (D and H), using either the signal peptide and the natural propeptide of the protein (AF), or the signal peptide of the tobacco chitinase and a propeptide of the CIA (GI) peptidase family in order to increase the yields.
- B, C, F and G or the alpha (E and I) subunit or the beta subunit (D and H)
- AF signal peptide and the natural propeptide of the protein
- GI propeptide of the CIA
- Pectate lyase is also produced in mutated form on lysine 180 (Kl 80) in order to limit proteolysis allowing the production of alpha and beta subunits (F).
- A (SEQ ID NO: 1): cDNA coding for the natural preproprotein (SEQ sequence
- This cDNA may be fused to addressing signals described in application WO2008 / 056265,
- SEQ ID NO: 2 cDNA optimized for use in N. benthamiana, encoding the natural preproprotein (sequence SEQ ID NO: 7). This cDNA may be fused to addressing signals described in application WO2008 / 056265,
- C (SEQ ID NO: 3): harmonized cDNA coding for the form of the natural preproprotein (of sequence SEQ ID NO: 7).
- This cDNA contains codons optimized for use in N.benthamiana, but also includes rare codons, in order to preserve the synthesis rate of the protein for better conservation of the 3D structure.
- This cDNA may be fused to addressing signals described in application WO2008 / 056265,
- D native / optimized / harmonized cDNA coding for the beta subunit (of sequence SEQ ID NO: 8). This cDNA may be fused to addressing signals described in application WO2008 / 056265.
- E native / optimized / harmonized cDNA coding for the alpha subunit (of sequence SEQ ID NO: 9). This cDNA may be fused to addressing signals described in application WO2008 / 056265.
- F native / optimized / harmonized cDNA encoding the mutated form (K180) of the protein. This cDNA may be fused to the addressing signals described in the application
- G native / optimized / harmonized cDNA coding for the mature form of the protein fused to the tobacco chitinase signal sequence (Neuhaus, J.-M., 1996) and the propeptide Der pl (p08176 - aa 19 to 98 or SEQ ID NO: 6).
- This cDNA may be fused to addressing signals described in application WO2008 / 056265.
- H native / optimized / harmonized cDNA encoding the beta subunit of the protein fused to the tobacco chitinase signal sequence (Neuhaus, J.-M., 1996) and the propeptide Der pl (p08176 - aa 19 to 98 or SEQ ID NO: 6).
- This cDNA may be fused to addressing signals described in application WO2008 / 056265.
- FIG 3 Expression of the Amb a protein 1.
- the proteins extracted from plants transfected with the native cDNA (F1-F3), with the optimized cDNA (F4-F6) or with the harmonized cDNA (F7-F9) coding Amb-1 protein was separated by SDS-PAGE and analyzed for immuno-detection with an antibody against a Flag tag.
- the immuno-detection assay shows the specific production of the Amb a 1 protein and the alpha subunit. The cleaved beta subunit is not immunodetected on this blot.
- Figure 4 Purification of the allergen Amb 1.
- FIG. 5 Expression of the allergen Amb a 11.
- the proteins extracted from 3 plants (PI-P3) transfected with the cDNA encoding the allergen Amb a 1 I were separated by SDS-PAGE electrophoresis. Protein extracts are analyzed as soon as they are extracted (OH) or after incubation for 12 hours (12 hours) at room temperature. Incubation at room temperature shows the accumulation of two polypeptides corresponding to Amb a 11, as well as the almost complete degradation of N. benthamiana proteins.
- the allergen Amb a 11 is therefore produced in active form according to the same process as that currently described for Amb a 1.
- the cDNAs are synthesized in native form, optimizing the use of codons for their recognition by the plant system or by harmonizing the use of codons (reintroduction of rare codons to rhythm the synthesis of the protein).
- the preferred optimization is the optimization for expression in Nicotiana benthamiana, as shown in FIG. 1.
- Xba I / kpn I and Sal I / Sac I restriction sites are respectively integrated at the 5 'and 3' ends of the cDNA during the synthesis. These sites are then used to clone the cDNAs into the pAG01 binary expression vector ( Figure 1).
- the cDNAs are cloned upstream of a 35S promoter (35S) and downstream of a nopaline synthase termination sequence (Tnos); the pAGO1 vector additionally contains an expression cassette making it possible to express the simultaneous p19 silencing inhibitor of the recombinant protein in order to increase the production yields.
- the vectors are then used to transform Agrobacterium tumefaciens strain LBA4404. Transient expression of pectates lyases according to the invention in leaves of Nicotiana benthamiana - Use of the AllergoPur platform
- Agobacterium tumefaciens LBA4404 is used for the transfer of a cDNA encoding pectate lyase without the gene of interest being integrated into the genome of the plant cell: this is called transfection and not transgenesis.
- the plants are grown under hydroponic conditions in the presence of a nutrient medium (GHE, floragrow, floramicro, florabloom, 10mL / 15mL / 5mL per 10 L of osmosis water) and under LED lighting.
- GHE nutrient medium
- Agrobacteria are transferred to leaf tissue by agroinfiltration by two methods.
- the Agrobacteria are injected manually using a syringe applied against the epidermis of the underside of the leaf.
- Leaf discs taken from the leaves 4 to 6 days after the agroinfiltration are used for the analysis of the different prototypes of pectate lyases. This screening step makes it possible to define the expression vector that will be used to obtain a pectate lyase of optimal quality.
- agro-infiltration is carried out under vacuum, in enclosures containing several liters of a culture of agrobacteria and where several tens of plants are infiltrated simultaneously. These plants are then re-cultured for 4 to 6 days before purification of the pectates lyases from the leaf extracts ( Figure 2).
- the expressed proteins are active. Indeed, the expression of Amb a 1 causes significant necrosis from the 4th day of expression compared to control plants. These necroses are due to a strong pectate lyase activity (Liu et al, 2010).
- pectate lyases are extracted from fresh or frozen biomass and then purified on IMAC column (HisTrap Excell). This purification allows the production of the precursor form (preproprotein) and the alpha subunit.
- allergens Amb a 1 and Amb a i 1 obtained by the process according to the invention to obtain a composition that can be used in allergic immunotherapy.
- allergens can be produced and purified after mechanical extraction as described in application FR1255510, or according to the enzymatic infiltration extraction alternative as described in the present application.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP15732775.0A EP3145948B1 (fr) | 2014-05-23 | 2015-05-20 | Production commerciale de l'allergène amb a1 par expression transitoire chez les plantes |
ES15732775T ES2781861T3 (es) | 2014-05-23 | 2015-05-20 | Producción comercial del alergeno Amb a1 por expresión transitoria en plantas |
US15/313,802 US20170159037A1 (en) | 2014-05-23 | 2015-05-20 | Commercial production of allergen amb a 1 by means of transient expression in plants |
CA2949875A CA2949875C (fr) | 2014-05-23 | 2015-05-20 | Production commerciale de l'allergene amb a1 par expression transitoire chez les plantes |
DK15732775.0T DK3145948T3 (da) | 2014-05-23 | 2015-05-20 | Kommerciel produktion af allergen amb a 1 ved hjælp af transient ekspression i planter |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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FR1454653A FR3021328B1 (fr) | 2014-05-23 | 2014-05-23 | Production commerciale de l'allergene amb a1 par expression transitoire chez les plantes |
FR1454653 | 2014-05-23 |
Publications (1)
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WO2015177464A1 true WO2015177464A1 (fr) | 2015-11-26 |
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PCT/FR2015/051319 WO2015177464A1 (fr) | 2014-05-23 | 2015-05-20 | Production commerciale de l'allergène amb a1 par expression transitoire chez les plantes |
Country Status (7)
Country | Link |
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US (1) | US20170159037A1 (fr) |
EP (1) | EP3145948B1 (fr) |
CA (1) | CA2949875C (fr) |
DK (1) | DK3145948T3 (fr) |
ES (1) | ES2781861T3 (fr) |
FR (1) | FR3021328B1 (fr) |
WO (1) | WO2015177464A1 (fr) |
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JP6817341B2 (ja) * | 2016-06-14 | 2021-01-20 | ブロムクイスト、リチャード | 宇宙船及び制御方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1255510A (fr) | 1960-01-28 | 1961-03-10 | S E B A M | Charnière invisible pour porte de meuble |
WO2000020612A2 (fr) * | 1998-10-07 | 2000-04-13 | Syngenta Participations Ag | Proteines vegetales a action therapeutique |
FR2809413A1 (fr) * | 2000-05-29 | 2001-11-30 | Tabacs & Allumettes Ind | Production d'allergenes recombinants dans des cellules vegetales |
WO2008056265A2 (fr) | 2006-11-08 | 2008-05-15 | Centre National De La Recherche Scientifique-Cnrs | Ensemble de séquences pour ciblage d'expression et contrôle des modifications post-traduction d'un polypeptide de recombinaison |
EP2692732A1 (fr) * | 2012-08-03 | 2014-02-05 | Stallergenes S.A. | Nouvel allergène du pollen d'ambroisie et ses utilisations |
-
2014
- 2014-05-23 FR FR1454653A patent/FR3021328B1/fr active Active
-
2015
- 2015-05-20 DK DK15732775.0T patent/DK3145948T3/da active
- 2015-05-20 ES ES15732775T patent/ES2781861T3/es active Active
- 2015-05-20 WO PCT/FR2015/051319 patent/WO2015177464A1/fr active Application Filing
- 2015-05-20 EP EP15732775.0A patent/EP3145948B1/fr active Active
- 2015-05-20 CA CA2949875A patent/CA2949875C/fr active Active
- 2015-05-20 US US15/313,802 patent/US20170159037A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1255510A (fr) | 1960-01-28 | 1961-03-10 | S E B A M | Charnière invisible pour porte de meuble |
WO2000020612A2 (fr) * | 1998-10-07 | 2000-04-13 | Syngenta Participations Ag | Proteines vegetales a action therapeutique |
FR2809413A1 (fr) * | 2000-05-29 | 2001-11-30 | Tabacs & Allumettes Ind | Production d'allergenes recombinants dans des cellules vegetales |
WO2008056265A2 (fr) | 2006-11-08 | 2008-05-15 | Centre National De La Recherche Scientifique-Cnrs | Ensemble de séquences pour ciblage d'expression et contrôle des modifications post-traduction d'un polypeptide de recombinaison |
EP2692732A1 (fr) * | 2012-08-03 | 2014-02-05 | Stallergenes S.A. | Nouvel allergène du pollen d'ambroisie et ses utilisations |
Non-Patent Citations (8)
Title |
---|
"An Integrated View of the Molecular Recognition and Toxinology - From Analytical Procedures to Biomedical Applications", 1 July 2013, INTECH, ISBN: 978-9-53-511151-1, article JOS CANTILLO ET AL: "From Molecular Cloning to Vaccine Development for Allergic Diseases", XP055161355, DOI: 10.5772/52821 * |
GREGORY P. POGUE ET AL: "Production of pharmaceutical-grade recombinant aprotinin and a monoclonal antibody product using plant-based transient expression systems", PLANT BIOTECHNOLOGY JOURNAL, vol. 8, no. 5, 1 June 2010 (2010-06-01), pages 638 - 654, XP055038517, ISSN: 1467-7644, DOI: 10.1111/j.1467-7652.2009.00495.x * |
GRIFFITH I J ET AL: "SEQUENCE POLYMORPHISM OF AMB A I AND AMB A II, THE MAJOR ALLERGENS IN AMBROSIA ARTEMISIIFOLIA (SHORT RAGWEED)", INTERNATIONAL ARCHIVES OF ALLERGY AND APPLIED IMMUNOLOGY, BASEL, CH, vol. 96, no. 4, 1 January 1991 (1991-01-01), pages 296 - 304, XP000647685, ISSN: 0020-5915 * |
LOÏC FAYE ET AL: "Success stories in molecular farming-a brief overview", PLANT BIOTECHNOLOGY JOURNAL, vol. 8, no. 5, 9 May 2010 (2010-05-09), pages 525 - 528, XP055038398, ISSN: 1467-7644, DOI: 10.1111/j.1467-7652.2010.00521.x * |
MURRAY ET AL., NUCLEIC ACID RES, vol. 17, 1980, pages 477 498 |
PEARSON; LIPMAN, PNAS, vol. 85, 1988, pages 2444 - 2448 |
SMITH; WATERMAN; 1981, J. MOL EVOL., vol. 18, pages 38 - 46 |
VOINNET O ET AL: "An enhanced transient expression system in plants based on suppression of gene silencing by the p19 protein of tomato bushy stunt virus", THE PLANT JOURNAL, BLACKWELL SCIENTIFIC PUBLICATIONS, OXFORD, GB, vol. 33, no. 5, 1 March 2003 (2003-03-01), pages 949 - 956, XP002367694, ISSN: 0960-7412, DOI: 10.1046/J.1365-313X.2003.01676.X * |
Also Published As
Publication number | Publication date |
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US20170159037A1 (en) | 2017-06-08 |
EP3145948A1 (fr) | 2017-03-29 |
FR3021328A1 (fr) | 2015-11-27 |
EP3145948B1 (fr) | 2020-01-01 |
CA2949875A1 (fr) | 2015-11-26 |
ES2781861T3 (es) | 2020-09-08 |
DK3145948T3 (da) | 2020-04-06 |
CA2949875C (fr) | 2023-09-12 |
FR3021328B1 (fr) | 2018-01-05 |
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